I struggle to see how that mounting point and mount design has the flexibility to accommodate narrower positions. It needs to dip so the computer has room to sit below the extensions, and ideally offer some form of horizontal adjustment.

Listed tire clearance for the open mold version is 28mm, and 30mm for the Onirii. Any chance you could stick an allen key between the fork and tire and chainstays, seattube, and tire and give us an idea of how much space there actually is to work with? Considering building up and painting one of the open mold versions to replace my TCR.

I’ve only ridden it once outside with a steer tube extension plug while I wait for new fork. Been just using it on the trainer due to safety.

It felt great with 32mm tubeless tires at around 60psi. Aero position felt solid. I’m running 2x SRAM AXS with mech hydraulic breaks. They don’t feel as good as true hydraulics but no issues stopping down a fast descent.

I took BadIdeasMakeGoodStories advice and swapped the riser bolts. Does feel more secure than when I tried it with the supplied ones on the trainer.

I got a 54.  Im 182.5 cm tall with an 82cm inseam. With short legs long torso I wanted a smaller frame.  I’m running a 110mm stem currently. I could have made a 56 work but the geo compared to other companies and my road bike I’ve been using with clip on aero bars made 54 seem the better fit.

Any issues with your stem slipping / rotating around the steerer? I've been putting off swapping it out for a PD Tri stem because I don't want to deal with recabling / bleeding the front end, but might see if Winow will replace mine if it's possible it's a one-off issue.

But you may actually be able to buy the FCR at some point…Bross has been delayed how many times now?

Is the 1500g quoted for the frame including or excluding the fork?

Amazing, thank you so much for all that info!

I can't believe there's next to no options for TT disc brakes. The shift to discs is such a shame.

Building up a rim brake TT bike, while cost effective and practical, leaves me with hesitation considering parts
Cheers

Jagwire (under the RideRever brand) and TRP both make relatively affordable hydro disc levers while retaining support for basebar shifting. JuinTech, HyRd, and other hydro-mechanical options come in at about half that price again.

Rim remains cheaper overall, but the increased braking performance and ability to share wheels with other road bikes was worth the cost to me.

Info for anyone else who may be purchasing. Spacer bolts are M5, I bought sets in 20mm increments from 40-100mm from Bolt Depot for <$10 to play with pad height. I believe the spacers are compatible with the PD A3A riser kit, but have yet to order and check -- still getting other aspects of the fit dialed.


Some niggles:

- the hardware holding the arm rests / clamping the extensions is incredibly soft. I recommend replacing it right away.
- had to sand down the seatpost to allow for movement within the seattube
- bottle cage mounts are too far down the downtube to mount a standard bottle cage. Even with a sideloader the rear wheel cut out is too large to allow the bottle to sit flush. Might be fixed on larger sizes, but if even a 54 is too small I doubt it. Using a Wolftooth B-Rad to move it farther up the downtube for now, and planning to try the Cervelo aero bottle, which looks like it may clear.
- Stem clamps from only one side and has a weak hold on the steerer. Needs to be torqued to 6-7Nm or it still wants to turn. Going to try adding some carbon paste and see if that helps.

nice to see some more options for disc come to market in recent months. anyone know why there's such a sudden uptick?